upgrade application will not execute (13.10->14.04)

[jkorten]

"Could not calculate the upgrade

An unresolvable problem occurred while calculating the upgrade.

 This can be caused by:
 * Upgrading to a pre-release version of Ubuntu
 * Running the current pre-release version of Ubuntu
 * Unofficial software packages not provided by Ubuntu

If none of this applies, then please report this bug using the command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal."

Which I did. I will try cleaning up the apt-get to see if this helps but would appreciate any advice otherwise. Thanks!

lsb_release shows 13.10
apt-catche policy pkgname returns "N: unable to locate package pkgname"

I expected to be able to upgrade (as I can on my other 3 Ubuntu laptops) but this one won't and I get the error message posted above.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: ubuntu-release-upgrader-core 1:0.205.5
ProcVersionSignature: Ubuntu 3.11.0-19.33-generic 3.11.10.5
Uname: Linux 3.11.0-19-generic i686
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: i386
CrashDB: ubuntu
Date: Thu Apr 24 11:36:41 2014
InstallationDate: Installed on 2013-11-15 (160 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release i386 (20131016.1)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to saucy on 2014-04-24 (0 days ago)
VarLogDistupgradeTermlog: